ALITA 228 – Ideal Choice for Pultruded Fiberglass Rods

Principal Properties & Application:

ALITA 228 resin is an unsaturated polyester resin made mainly from phthalic anhydride, featuring medium viscosity and medium reactivity. ALITA 228 resin boasts high mechanical strength and toughness, making it ideal for pultrusion processes. This resin is particularly suited for manufacturing pultruded fiberglass rods used in tent poles, grilles, doors, windows, and other products.

Liquid resin technical indicators:

Note: Gel time test at 25°C: 25°C water bath, add 0.9g accelerator (1% Co) and 0.9g M-50 (Nouryon) to 50g resin.

Physical properties of the casting (for reference only):

Note:
The casting method is performed according to GB/T 8237-2005, curing system: promoter 0.6% Co Naph 1.0%, curing agent Enox BPO-50F 1%;
Casting: 4mm thick, post-curing conditions are: room temperature × 24h, 60℃ × 3h, 110℃ × 2h.

Usage instructions:

1. ALITA 228 resin does not contain wax, accelerator, or thixotropic agent.
2. The recommended curing system for pultrusion processes is BPO curing agent 0.5-2.0% and TBPB curing agent 0.5-1.5%. The actual selection should be based on specific equipment, products, process temperature, pultrusion speed, and other factors. When making thick products, it is recommended to add a low shrinkage agent to reduce the shrinkage rate.
3. For higher heat resistance and seawater resistance requirements, it is recommended to choose isophthalic ALITA 239 resin; for higher corrosion resistance requirements, it is recommended to choose epoxy vinyl ester ALITA 901 resin.

Handling and Storage:

This resin contains ingredients which could be harmful if mishandled. Contact with skin and eyes should be avoided and necessary protective equipment and clothing should be worn.
Drums – It is highly recommended that all material is stored at stable temperatures below 25°C (77°F). Avoid exposure to heat sources such as direct sunlight or steam pipes. To avoid contamination of product with water, do not store outdoors. Keep sealed to prevent moisture pick-up and monomer loss. Rotate stock.